contest full with full force at appellate court (take it as a last chance. otherwise after that there becomes a 'substantial question of law'. task impossible almost at SC ... SLP etc)
First obtain stay on execution to keep paying (Not so easy) Give security interms of a guaranrty etc. Show irreparable harm to you if stay not grnated. Show misconduct of other party in regards to how she obtained this decree by fraud.
Just making allegation won't suffice,
Also sustain some pain of paying partially atleast (else you may go to jail)
Make a detailed appeal without failing to miss any point or evidence to submit.
Delay on your own won't help.
Accrual amount keeps increasing.